26.4.3.16 The memory_by_host_by_current_bytes and x$memory_by_host_by_current_bytes Views

These views summarize memory use, grouped by host. By default, rows are sorted by descending amount of memory used.

host

The host from which the client connected. Rows for which the HOST column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background.
current_count_used

The current number of allocated memory blocks that have not been freed yet for the host.
current_allocated

The current number of allocated bytes that have not been freed yet for the host.
current_avg_alloc

The current number of allocated bytes per memory block for the host.
current_max_alloc

The largest single current memory allocation in bytes for the host.
total_allocated

The total memory allocation in bytes for the host.